X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Fdv.c;h=5be6118a7a364b4eec76c3f636b04ab1d938dcd5;hb=148bc235b0dbf5e3dcd12fc4480475008a719576;hp=4e256d7d3937940227641f846767bb2c493e3c1d;hpb=a2704c9712ad35cc22e7e0d8a79b581c07fa383b;p=ffmpeg diff --git a/libavformat/dv.c b/libavformat/dv.c index 4e256d7d393..5be6118a7a3 100644 --- a/libavformat/dv.c +++ b/libavformat/dv.c @@ -12,26 +12,28 @@ * Copyright (c) 2006 Daniel Maas * Funded by BBC Research & Development * - * This file is part of FFmpeg. + * This file is part of Libav. * - * FFmpeg is free software; you can redistribute it and/or + * Libav is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * - * FFmpeg is distributed in the hope that it will be useful, + * Libav is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software + * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include "avformat.h" +#include "internal.h" #include "libavcodec/dvdata.h" #include "libavutil/intreadwrite.h" +#include "libavutil/mathematics.h" #include "dv.h" struct DVDemuxContext { @@ -95,7 +97,7 @@ static const uint8_t* dv_extract_pack(uint8_t* frame, enum dv_pack_type t) /* * There's a couple of assumptions being made here: * 1. By default we silence erroneous (0x8000/16bit 0x800/12bit) audio samples. - * We can pass them upwards when ffmpeg will be ready to deal with them. + * We can pass them upwards when libavcodec will be ready to deal with them. * 2. We don't do software emphasis. * 3. Audio is always returned as 16bit linear samples: 12bit nonlinear samples * are converted into 16bit linear ones. @@ -125,10 +127,14 @@ static int dv_extract_audio(uint8_t* frame, uint8_t* ppcm[4], /* We work with 720p frames split in half, thus even frames have * channels 0,1 and odd 2,3. */ ipcm = (sys->height == 720 && !(frame[1] & 0x0C)) ? 2 : 0; - pcm = ppcm[ipcm++]; /* for each DIF channel */ for (chan = 0; chan < sys->n_difchan; chan++) { + /* next stereo channel (50Mbps and 100Mbps only) */ + pcm = ppcm[ipcm++]; + if (!pcm) + break; + /* for each DIF segment */ for (i = 0; i < sys->difseg_size; i++) { frame += 6 * 80; /* skip DIF segment header */ @@ -176,11 +182,6 @@ static int dv_extract_audio(uint8_t* frame, uint8_t* ppcm[4], frame += 16 * 80; /* 15 Video DIFs + 1 Audio DIF */ } } - - /* next stereo channel (50Mbps and 100Mbps only) */ - pcm = ppcm[ipcm++]; - if (!pcm) - break; } return size; @@ -202,6 +203,12 @@ static int dv_extract_audio_info(DVDemuxContext* c, uint8_t* frame) stype = (as_pack[3] & 0x1f); /* 0 - 2CH, 2 - 4CH, 3 - 8CH */ quant = as_pack[4] & 0x07; /* 0 - 16bit linear, 1 - 12bit nonlinear */ + if (stype > 3) { + av_log(c->fctx, AV_LOG_ERROR, "stype %d is invalid\n", stype); + c->ach = 0; + return 0; + } + /* note: ach counts PAIRS of channels (i.e. stereo channels) */ ach = ((int[4]){ 1, 0, 2, 4})[stype]; if (ach == 1 && quant && freq == 2) @@ -210,10 +217,10 @@ static int dv_extract_audio_info(DVDemuxContext* c, uint8_t* frame) /* Dynamic handling of the audio streams in DV */ for (i = 0; i < ach; i++) { if (!c->ast[i]) { - c->ast[i] = av_new_stream(c->fctx, 0); + c->ast[i] = avformat_new_stream(c->fctx, NULL); if (!c->ast[i]) break; - av_set_pts_info(c->ast[i], 64, 1, 30000); + avpriv_set_pts_info(c->ast[i], 64, 1, 30000); c->ast[i]->codec->codec_type = AVMEDIA_TYPE_AUDIO; c->ast[i]->codec->codec_id = CODEC_ID_PCM_S16LE; @@ -243,7 +250,7 @@ static int dv_extract_video_info(DVDemuxContext *c, uint8_t* frame) if (c->sys) { avctx = c->vst->codec; - av_set_pts_info(c->vst, 64, c->sys->time_base.num, + avpriv_set_pts_info(c->vst, 64, c->sys->time_base.num, c->sys->time_base.den); avctx->time_base= c->sys->time_base; if (!avctx->width){ @@ -269,7 +276,7 @@ static int dv_extract_video_info(DVDemuxContext *c, uint8_t* frame) * The following 3 functions constitute our interface to the world */ -DVDemuxContext* dv_init_demux(AVFormatContext *s) +DVDemuxContext* avpriv_dv_init_demux(AVFormatContext *s) { DVDemuxContext *c; @@ -277,7 +284,7 @@ DVDemuxContext* dv_init_demux(AVFormatContext *s) if (!c) return NULL; - c->vst = av_new_stream(s, 0); + c->vst = avformat_new_stream(s, NULL); if (!c->vst) { av_free(c); return NULL; @@ -298,7 +305,7 @@ DVDemuxContext* dv_init_demux(AVFormatContext *s) return c; } -int dv_get_packet(DVDemuxContext *c, AVPacket *pkt) +int avpriv_dv_get_packet(DVDemuxContext *c, AVPacket *pkt) { int size = -1; int i; @@ -315,14 +322,14 @@ int dv_get_packet(DVDemuxContext *c, AVPacket *pkt) return size; } -int dv_produce_packet(DVDemuxContext *c, AVPacket *pkt, +int avpriv_dv_produce_packet(DVDemuxContext *c, AVPacket *pkt, uint8_t* buf, int buf_size) { int size, i; uint8_t *ppcm[4] = {0}; if (buf_size < DV_PROFILE_BYTES || - !(c->sys = ff_dv_frame_profile(c->sys, buf, buf_size)) || + !(c->sys = avpriv_dv_frame_profile(c->sys, buf, buf_size)) || buf_size < c->sys->frame_size) { return -1; /* Broken frame, or not enough data */ } @@ -335,7 +342,8 @@ int dv_produce_packet(DVDemuxContext *c, AVPacket *pkt, c->audio_pkt[i].pts = c->abytes * 30000*8 / c->ast[i]->codec->bit_rate; ppcm[i] = c->audio_buf[i]; } - dv_extract_audio(buf, ppcm, c->sys); + if (c->ach) + dv_extract_audio(buf, ppcm, c->sys); /* We work with 720p frames split in half, thus even frames have * channels 0,1 and odd 2,3. */ @@ -368,9 +376,9 @@ static int64_t dv_frame_offset(AVFormatContext *s, DVDemuxContext *c, int64_t timestamp, int flags) { // FIXME: sys may be wrong if last dv_read_packet() failed (buffer is junk) - const DVprofile* sys = ff_dv_codec_profile(c->vst->codec); + const DVprofile* sys = avpriv_dv_codec_profile(c->vst->codec); int64_t offset; - int64_t size = url_fsize(s->pb) - s->data_offset; + int64_t size = avio_size(s->pb) - s->data_offset; int64_t max_offset = ((size-1) / sys->frame_size) * sys->frame_size; offset = sys->frame_size * timestamp; @@ -400,19 +408,18 @@ typedef struct RawDVContext { uint8_t buf[DV_MAX_FRAME_SIZE]; } RawDVContext; -static int dv_read_header(AVFormatContext *s, - AVFormatParameters *ap) +static int dv_read_header(AVFormatContext *s) { unsigned state, marker_pos = 0; RawDVContext *c = s->priv_data; - c->dv_demux = dv_init_demux(s); + c->dv_demux = avpriv_dv_init_demux(s); if (!c->dv_demux) return -1; state = avio_rb32(s->pb); while ((state & 0xffffff7f) != 0x1f07003f) { - if (url_feof(s->pb)) { + if (s->pb->eof_reached) { av_log(s, AV_LOG_ERROR, "Cannot find DV header.\n"); return -1; } @@ -431,7 +438,7 @@ static int dv_read_header(AVFormatContext *s, avio_seek(s->pb, -DV_PROFILE_BYTES, SEEK_CUR) < 0) return AVERROR(EIO); - c->dv_demux->sys = ff_dv_frame_profile(c->dv_demux->sys, c->buf, DV_PROFILE_BYTES); + c->dv_demux->sys = avpriv_dv_frame_profile(c->dv_demux->sys, c->buf, DV_PROFILE_BYTES); if (!c->dv_demux->sys) { av_log(s, AV_LOG_ERROR, "Can't determine profile of DV input stream.\n"); return -1; @@ -449,7 +456,7 @@ static int dv_read_packet(AVFormatContext *s, AVPacket *pkt) int size; RawDVContext *c = s->priv_data; - size = dv_get_packet(c->dv_demux, pkt); + size = avpriv_dv_get_packet(c->dv_demux, pkt); if (size < 0) { if (!c->dv_demux->sys) @@ -458,7 +465,7 @@ static int dv_read_packet(AVFormatContext *s, AVPacket *pkt) if (avio_read(s->pb, c->buf, size) <= 0) return AVERROR(EIO); - size = dv_produce_packet(c->dv_demux, pkt, c->buf, size); + size = avpriv_dv_produce_packet(c->dv_demux, pkt, c->buf, size); } return size; @@ -519,14 +526,14 @@ static int dv_probe(AVProbeData *p) #if CONFIG_DV_DEMUXER AVInputFormat ff_dv_demuxer = { - "dv", - NULL_IF_CONFIG_SMALL("DV video format"), - sizeof(RawDVContext), - dv_probe, - dv_read_header, - dv_read_packet, - dv_read_close, - dv_read_seek, + .name = "dv", + .long_name = NULL_IF_CONFIG_SMALL("DV video format"), + .priv_data_size = sizeof(RawDVContext), + .read_probe = dv_probe, + .read_header = dv_read_header, + .read_packet = dv_read_packet, + .read_close = dv_read_close, + .read_seek = dv_read_seek, .extensions = "dv,dif", }; #endif